And as he sat on the mount of Olives over against the temple, Peter and James and John and Andrew asked him privately, Tell us, when shall these things be? St. Matthew and St. Luke only mention his disciples generally. St. Mark, going more into detail, gives the names of those who thus asked him; namely, Peter and James and John, already distinguished, and Andrew, who enjoyed the distinction of having been the first called. These men appear to have been our Lord's inner council; and they asked him ( κατ ἰδίαν) privately, or separately, not only from the multitude, but from the rest of the disciples. It was a dangerous thing to speak of the destruction of the temple, or even to inquire about such an event, for fear of the scribes and Pharisees. It was this accusation that led to the stoning of Stephen. It is evident from St. Matthew (Matthew 24:3) that the disciples closely associated together the destruction of the temple and his final coming at the end of the world. They knew from our Lord's words that the destruction of Jerusalem was near at hand, and therefore they thought that the destruction of the world itself, and the day of judgment, were also near at hand. Hence their questions.
Take heed that no man lead you astray. The Greek word is πλανήση. Their first temptation would be of this kind—that many would come in Christ's name, saying, "I am he;" claiming, that is, the title which belonged to him alone. Such were Theudas (Acts 5:36) and Simon Magus (Acts 8:10), who, according to Jerome, said, "Ego sum Sermo Dei, ego speciosus, ego Paracletus, ego omnipotens, ego omnia." Such were Menander and the Gnostics.